United Brass Works 902 High Pressure Upper Gauge Fixture Overview
The United Brass Works 902 is a 1/2-inch high pressure upper gauge fixture valve with ball check designed for industrial boiler gauge and fluid-level monitoring applications. It serves as the upper valve in compatible gauge glass assemblies and provides a controlled connection between the pressure vessel or boiler and the upper portion of the gauge glass.
The United Brass Works 902 is rated for 250 WSP at a maximum temperature of 406°F. United Brass Works identifies the valve for water, steam, oil, and gas applications and specifies compliance with ASME B31.1 and Section I, PG-60, Appendix A-18 of the ASME Boiler Code. United Brass Works, Inc.
One of the principal safety-related features of the Model 902 is its 302 stainless steel internal ball check. In a boiler gauge installation, the ball check provides an automatic shut-off function intended to help restrict fluid or steam discharge if the gauge glass is damaged. The manufacturer uses the Model 902 as the upper fixture in its Model 34041 high pressure boiler gauge fixture set. United Brass Works, Inc.
The valve incorporates a bronze alloy body along with corrosion-resistant and durable internal components. Manufacturer documentation identifies CDA 836 for the body, 302 stainless steel for the ball, and 300 Series stainless steel for the retaining ring. The union tail piece and bonnet are manufactured from CDA 360, while the stem is CDA 693. United Brass Works, Inc.
Additional sealing and operating components include EPDM and Buna O-rings, packing material, an FKM seal washer, stainless steel rod bracket, brass glass nut, and zinc hand wheel. This combination of materials is intended to provide reliable operation in demanding industrial gauge applications within the manufacturer’s published pressure and temperature limits. United Brass Works, Inc.
The union-style connection arrangement assists with positioning the gauge assembly and provides a practical configuration for maintenance or replacement. When installed as part of a complete boiler gauge fixture system, the upper fixture works together with the lower gauge fixture, protective rods, gauge glass, seals, and associated hardware.
The Model 902 is specifically paired with the United Brass Works Model 903 lower fixture in the Model 34041 assembly. This makes the 902 suitable both as an individual replacement component and as part of a complete high-pressure boiler gauge fixture installation. United Brass Works, Inc.
Proper selection of any gauge fixture should consider the operating pressure, temperature, media, connection size, gauge glass configuration, and applicable boiler or piping codes. Installation and maintenance should follow the equipment manufacturer’s requirements and applicable regulations.
United Brass Works lists an approximate unit weight of 2.9 lb for the Model 902. The manufacturer’s documentation also states that the product contains lead and is not intended for potable water systems. United Brass Works, Inc.
For boiler maintenance, gauge glass replacement, and industrial water-level monitoring systems requiring an individual upper fixture, the Model 902 provides a high-pressure configuration with an integrated ball-check safety feature.
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